Table 1:

Classification of splenic injuries as proposed by the American Association for the Surgery of Trauma (AAST), 1994 revision (16)

Grade	Injury	Criteria
I	Haematoma	Subcapsular, <10% of surface area
	Laceration	Capsular tear, <1-cm parenchymal depth
II	Haematoma	Subcapsular, 10–50% of surface area Intraparenchymal, <5-cm diameter
	Laceration	1-cm to 3-cm parenchymal depth that does not involve a trabecular vessel
III	Haematoma	Subcapsular, >50% of surface area or expanding Subcapsular or intraparenchymal, ruptured Intraparenchymal, ≥5-cm diameter or expanding
	Laceration	>3-cm parenchymal depth or involving trabecular vessels
IV	Laceration	Laceration involving segmental or hilar vessels producing major devascularization of >25% of the spleen
V	Laceration	Completely shattered spleen
	Vascular	Hilar vascular injury that devascularizes the spleen

Advance one grade for multiple injury (up to Grade III)